Improved flexible ZnO/CsPbBr3/Graphene UV photodetectors with interface optimization by solution process
Improved flexible ZnO/CsPbBr3/Graphene UV photodetectors with interface optimization by solution process
复制标题
通过溶液工艺优化界面优化改进的柔性 ZnO/CsPbBr3/石墨烯紫外光电探测器
DOI：
10.1016/j.materresbull.2020.110956
复制
发表时间：
2020-10-01
影响因子：
5.4
通讯作者：
Zou, Yousheng
中科院分区：
文献类型：
--
作者：
Liu, Shuting;Liu, Xuhai;Zou, Yousheng
可直接装备在人体上的柔性可穿戴光电探测器（PD）因其在通信、健康和安全应用中的巨大潜力而受到广泛关注。然而，低灵活性和复杂的制造工艺阻碍了纤维和纺织品PD的实际应用的发展。在这里，我们使用一种有效的解决方案策略将CsPbBr 3 纳米片（NSs）集成到基于PVDF基板的传统ZnO纳米线（NWs）/石墨烯柔性薄膜PD中。与更简单的ZnO NWs/石墨烯结构相比，ZnO/CsPbBr3 PN结的内置电场可以促进光生载流子的分离和传输。此外，填充CsPbBr 3 NSs的ZnO网络导致界面光滑并与石墨烯紧密接触。通过界面优化，载流子传输效率的提高进一步导致接近10(3)的高I-光/I-暗比。此外，这种基于PVDF的PD表现出优异的灵活性，展示了实用柔性光电子学的巨大潜力。
Flexible and wearable photodetectors (PDs) that can be directly equipped on human bodies have attracted extensive attention due to their great potential in communication, health and safety applications. However, low flexibility and complicated fabrication process hinder the development of fiber- and textile-PDs for practical applications. Here, we use an efficient solution strategy to integrate CsPbBr 3 nanosheets (NSs) into conventional ZnO nanowires (NWs)/graphene flexible thin film PDs based on PVDF substrate. Compared with the simpler ZnO NWs/graphene structure, the built-in electric field of ZnO/CsPbBr3 PN junction can facilitate the separation and transport of the photo-generated carriers. Moreover, the ZnO networks filled with CsPbBr 3 NSs result in a smooth interface and close contacts with graphene. With the interface optimization, the enhanced transport efficiency of the carriers further leads to a high I-light/I-dark ratio of similar to 10(3). In addition, such PVDF based PDs exhibit excellent flexibility, demonstrating great potential for practical flexible optoelectronics.